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Changes in FLTK 1.4.0 Released: ??? ?? 2018
General Information about this Release
- FLTK 1.4.0 is based on FLTK 1.3.4 (released Nov 15 2016),
see CHANGES_1.3 for more information.
- CMake is the primary supported build system in FLTK 1.4.0 and later.
CMake can be used to generate Makefiles, IDE project files, and
several other build systems by using different "generators" provided
by CMake (for instance Ninja, CodeBlocks, Eclipse, KDevelop3, Xcode, etc.).
See README.CMake.txt for more information.
- autoconf/configure is still supported by the FLTK team for backwards
compatibility with older systems that lack CMake support.
New Features and Extensions
- (add new items here)
- New member functions Fl_Paged_Device::begin_job() and begin_page()
replace start_job() and start_page(). The start_... names are maintained
for API compatibility.
- New member function Fl_Image::scale(int width, int height) to set
the drawing size of an image independently from its data size. The
same function was previously available only for class Fl_Shared_Image
and with FL_ABI_VERSION >= 10304. New member functions Fl_Image::data_w()
and Fl_Image::data_h() give the width and height of the image data.
- OpenGL draws text using textures on all platforms, when the necessary
hardware support is present (a backup mechanism is available in absence
of this support). Thus, all text drawable in Fl_Window's can be drawn
in Fl_Gl_Window's (STR#3450).
- New member functions Fl::program_should_quit(void),
and Fl::program_should_quit(int) to support detection by the library
of a request to terminate cleanly the program.
- MacOS platform: the processing of the application menu's "Quit" item
has been changed. With FLTK 1.3.x, the application terminated when all
windows were closed even before Fl::run() of Fl::wait() could return.
With FLTK 1.4, Fl::run() returns so the app follows its normal termination path.
- MacOS platform: Added support for rescaling the GUI of any app at run-time
using the command/+/-/0/ keystrokes.
- MSWindows platform: Added support for rescaling the GUI of any app
at run-time using the ctrl/+/-/0/ keystrokes. All applications
detect the desktop scaling factor and automatically scale their GUI
accordingly. This effectively renders WIN32 FLTK apps "per-monitor DPI-aware"
whereas they were "DPI-unaware" with FLTK 1.3.4.
- FLTK apps on the MacOS platform contain automatically a Window menu, which,
under MacOS ≥ 10.12, allows to group/ungroup windows in tabbed form. The new
Fl_Sys_Menu_Bar::window_menu_style() function allows to specify various
styles for the Window menu, even not to create it.
- New function: int fl_open_ext(const char* fname, int binary, int oflags, ...)
to control the opening of files in binary/text mode in a cross-platform way.
- New Fl_SVG_Image class: gives support of scalable vector graphics images
to FLTK using the nanosvg software.
- Fl_Text_Selection got a new method length() and returns 0 in length()
and in all offsets (start(), end(), position()) if no text is selected
(selected() == false). The behavior in FLTK 1.3 and earlier versions
(returning undefined values if !selected()) was confusing.
- Added support for MacOS 10.13 "High Sierra".
- New method Fl_Group::bounds() replaces Fl_Group::sizes() which is now
deprecated. Fl_Group::bounds() uses the new class Fl_Rect that contains
widget coordinates and sizes x(), y(), w(), and h() (STR #3385).
Documentation for bounds() and its internal structure was added.
- X11 platform: Added support for HiDPI displays and for rescaling any window
at run-time under user control. Under the gnome desktop, FLTK applications
detect the current gnome scaling factor and use it to scale all FLTK windows.
Under other desktops, the FLTK_SCALING_FACTOR environment variable can be
used to set the starting scaling factor of all FLTK applications.
In addition, it is possible to rescale all FLTK windows mapped to a screen
by typing ctrl-'+' (enlarge), ctrl-'-' (shrink) or ctrl-'0' (back to starting
factor value). Windows moved between screens adjust to the scaling factor of
their screen. This supports desktops mixing screens with distinct resolutions.
- New method shadow(int) allows to disable the shadows of the hands
of Fl_Clock, Fl_Clock_Output, and derived widgets.
- New method Fl_Tabs::tab_align() allows to set alignment of tab labels,
particularly to support icons on tab labels (STR #3076).
- Added '--enable-print' option to configure effective under X11 platforms
and with 'yes' default value. Using '--enable-print=no' removes print
and PostScript support from the FLTK library, thus reducing its size.
- Added Fl_Surface_Device::push_current(new_surface) and
Fl_Surface_Device::pop_current() to set/unset the current surface
receiving graphics commands.
- X11 platform: Added support for drawing text with the pango library
which allows to draw most scripts supported by Unicode, including CJK
and right-to-left scripts. The corresponding CMake option is
OPTION_USE_PANGO. The corresponding configure option is --enable-pango.
This option is OFF by default.
New Configuration Options (ABI Version)
- The library can be built without support for SVG images using the
--disable-nanosvg configure option or turning off OPTION_USE_NANOSVG in CMake.
- FLTK's ABI version can be configured with 'configure' and CMake.
See documentation in README.abi-version.txt.
1.4.0 ABI FEATURES
- None. FLTK 1.4.0 has a new ABI, breaking 1.3.x ABI.
Other Improvements
- (add new items here)
- MacOS ≥ 10.10: Fl_Window::fullscreen() and fullscreen_off() no longer
proceed by Fl_Window::hide() + Fl_Window::show() but essentially
resize the window, as done on the X11+EWMH and Windows platforms.
- Fl_Cairo_Window constructors are now compatible with Fl_Double_Window
constructors - fixed missing constructors (STR #3160).
- The include file for platform specific functions and definitions
(FL/x.H) has been replaced with FL/platform.H. FL/x.H is deprecated
but still available for backwards compatibility (STR #3435).
FL/x.H will be removed in a (not yet specified) future FLTK release.
We recommend to change your #include statements accordingly.
- The Fl_Boxtype and Fl_Labeltype definitions contained enum values
(names) with a leading underscore (e.g. _FL_MULTI_LABEL) that had to
be used in this form. Now all boxtypes and labeltypes can and should
be used without the leading underscore. A note was added to the enum
documentations to make clear that the leading underscore must not be
used in user code, although the enum documentation still contains
leading underscores for technical reasons (internal use).
- The blocks demo program got a new keyboard shortcut (ALT+SHIFT+H) to
reset the user's high score. It is now slower than before in higher
levels, hence you can expect higher scores (due to a bug fix in the
timer code). You can use the '+' key to increase the level at all times.
- Some methods of Fl_Tabs are now virtual and/or protected for easier
subclassing without code duplication (STR #3211 and others).
To be continued...
- Separated Fl_Input_Choice.H and Fl_Input_Choice.cxx (STR #2750, #2752).
- Separated Fl_Spinner.H and Fl_Spinner.cxx (STR #2776).
- New method Fl_Spinner::wrap(int) allows to set wrap mode at bounds if
value is changed by pressing or holding one of the buttons (STR #3365).
- Fl_Spinner now handles Up and Down keys when the input field has
keyboard focus (STR #2989).
- Renamed test/help.cxx demo program to test/help_dialog.cxx to avoid
name conflict with CMake's auto-generated target 'help'.
- Many documentation fixes, clarifications, and enhancements.
Bug Fixes
- (add new items here)
- Fix a potential crash when a program exits before it opens a window
(Windows only, STR #3484).
- Fix Fl_PNG_Image error handling. An error was potentially caused
by error handling of the image library with setjmp/longjmp.
- Fix Fl_Browser background and text color parsing (STR #3376).
- Fix Windows CreateDC/DeleteDC mismatch (STR #3373).
- Fix Fl_Tabs label drawing for Fl_Window children (STR #3075).
- Fix line number alignment in Fl_Text_Display/Editor (STR #3363).
- Fix ignored buffer pre-allocation (requestedSize) in Fl_Text_Buffer.
See fltk.general "Fl_Text_Buffer constructor bug" on Dec 5, 2016.
- Fix build with configure --enable-cairo --enable-cairoext,
see this report in fltk.general:
https://groups.google.com/forum/#!topic/fltkgeneral/x80qQ6wt0s4
Removed Features
- Bundled IDE project files (Xcode and Visual Studio) have been
removed. Please use CMake to generate your IDE project files.
See README.CMake.txt for more information.
Changes in FLTK 1.3
See CHANGES_1.3
Changes in FLTK 1.1
See CHANGES_1.1
Changes in FLTK 1.0
See CHANGES_1.0